Charging dock



FIG. 1 is a front perspective of an embodiment of a charging dock showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a right side elevation view thereof;

FIG. 4 is a rear elevation view thereof;

FIG. 5 is front elevation view thereof; and,

FIG. 6 is a bottom plan view thereof.

The broken lines are directed to environment and are for illustrative purposes only; the broken lines form no part of the claimed design. 

CLAIM The ornamental design for charging dock, as shown and described. 